EHA valve readjustment
Thread Starter
MBWorld Fanatic!
Joined: Apr 2007
Posts: 2,381
Likes: 29
E
EHA valve readjustment
Is there a way to adjust it back to stock specs? I have fiddled with it and lost my original position.
I brought home one from the junkyard...but the car feels starved for fuel compared to mine...but buying a new one is very expensive...
I looked on the MB CD's but it only mentions replacement...not adjustment.
Anybody happen to know if its testable?
I brought home one from the junkyard...but the car feels starved for fuel compared to mine...but buying a new one is very expensive...
I looked on the MB CD's but it only mentions replacement...not adjustment.
Anybody happen to know if its testable?
Junior Member
Joined: Mar 2010
Posts: 41
Likes: 1
From: NY
*89 300 E -*91 300 TD -85 300SD *74 VW dune buggy
Never tought about. But good question tought.As profesional electrician it goes through my mind that EHA works same way as any light dimmer,but with some diference .While light dimmer gets electricity through as much you slide dimmer left or right,Eha opens and closes valve depending of an imput votage from computer where resistance of an spule inside the EHA is always very same. So my tought is that EHA is nothing more than electric valve and like that, one could be measured for "amount" of flow in agiven moment .
Super Member
Joined: Oct 2008
Posts: 837
Likes: 25
From: seattle
1990 300ce supercharged and intercooled
This is forbidden and you will be picked up by some strange men in a black sprinter van any minute.
I would unplug the eha and the o2 sensor. Check the voltage at the o2 sensor and make small adjustments until you reach 500mv. This should put you really close to correct as long as your fuel mixture was not far off when you started messing around.
I would unplug the eha and the o2 sensor. Check the voltage at the o2 sensor and make small adjustments until you reach 500mv. This should put you really close to correct as long as your fuel mixture was not far off when you started messing around.
Junior Member
Joined: Mar 2010
Posts: 41
Likes: 1
From: NY
*89 300 E -*91 300 TD -85 300SD *74 VW dune buggy
This is forbidden and you will be picked up by some strange men in a black sprinter van any minute.
I would unplug the eha and the o2 sensor. Check the voltage at the o2 sensor and make small adjustments until you reach 500mv. This should put you really close to correct as long as your fuel mixture was not far off when you started messing around.
I would unplug the eha and the o2 sensor. Check the voltage at the o2 sensor and make small adjustments until you reach 500mv. This should put you really close to correct as long as your fuel mixture was not far off when you started messing around.
Senior Member
Joined: Jun 2006
Posts: 303
Likes: 1
From: Northern California
It changes all the time
Never tought about. But good question tought.As profesional electrician it goes through my mind that EHA works same way as any light dimmer,but with some diference .While light dimmer gets electricity through as much you slide dimmer left or right,Eha opens and closes valve depending of an imput votage from computer where resistance of an spule inside the EHA is always very same. So my tought is that EHA is nothing more than electric valve and like that, one could be measured for "amount" of flow in agiven moment .
